780 lines
18 KiB
C
780 lines
18 KiB
C
/* $NetBSD: xform_ipip.c,v 1.29 2013/06/05 19:01:26 christos Exp $ */
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/* $FreeBSD: src/sys/netipsec/xform_ipip.c,v 1.3.2.1 2003/01/24 05:11:36 sam Exp $ */
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/* $OpenBSD: ip_ipip.c,v 1.25 2002/06/10 18:04:55 itojun Exp $ */
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/*
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* The authors of this code are John Ioannidis (ji@tla.org),
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* Angelos D. Keromytis (kermit@csd.uch.gr) and
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* Niels Provos (provos@physnet.uni-hamburg.de).
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*
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* The original version of this code was written by John Ioannidis
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* for BSD/OS in Athens, Greece, in November 1995.
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*
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* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
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* by Angelos D. Keromytis.
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*
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* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
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* and Niels Provos.
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*
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* Additional features in 1999 by Angelos D. Keromytis.
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*
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* Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
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* Angelos D. Keromytis and Niels Provos.
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* Copyright (c) 2001, Angelos D. Keromytis.
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*
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* Permission to use, copy, and modify this software with or without fee
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* is hereby granted, provided that this entire notice is included in
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* all copies of any software which is or includes a copy or
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* modification of this software.
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* You may use this code under the GNU public license if you so wish. Please
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* contribute changes back to the authors under this freer than GPL license
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* so that we may further the use of strong encryption without limitations to
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* all.
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*
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
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* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
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* PURPOSE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: xform_ipip.c,v 1.29 2013/06/05 19:01:26 christos Exp $");
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/*
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* IP-inside-IP processing
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*/
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#include "opt_inet.h"
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#ifdef __FreeBSD__
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#include "opt_inet6.h"
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#include "opt_random_ip_id.h"
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#endif /* __FreeBSD__ */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/kernel.h>
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#include <sys/protosw.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/netisr.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip_ecn.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_encap.h>
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#ifdef __FreeBSD__
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#include <netinet/ipprotosw.h>
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#endif
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#include <netipsec/ipsec.h>
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#include <netipsec/ipsec_private.h>
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#include <netipsec/xform.h>
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#include <netipsec/ipip_var.h>
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#ifdef MROUTING
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#include <netinet/ip_mroute.h>
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#endif
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netipsec/ipsec6.h>
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# ifdef __FreeBSD__
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# include <netinet6/ip6_ecn.h>
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# endif
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#include <netinet6/in6_var.h>
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#include <netinet6/ip6protosw.h>
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#endif
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#include <netipsec/key.h>
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#include <netipsec/key_debug.h>
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#include <netipsec/ipsec_osdep.h>
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#ifdef __FreeBSD__
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typedef void pr_in_input_t (struct mbuf *, int, int); /* XXX FIX THIS */
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#else
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typedef void pr_in_input_t (struct mbuf *m, ...);
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#endif
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/*
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* We can control the acceptance of IP4 packets by altering the sysctl
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* net.inet.ipip.allow value. Zero means drop them, all else is acceptance.
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*/
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int ipip_allow = 0;
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percpu_t *ipipstat_percpu;
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_net_inet_ipip);
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SYSCTL_INT(_net_inet_ipip, OID_AUTO,
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ipip_allow, CTLFLAG_RW, &ipip_allow, 0, "");
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SYSCTL_STRUCT(_net_inet_ipip, IPSECCTL_STATS,
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stats, CTLFLAG_RD, &ipipstat, ipipstat, "");
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#endif
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#ifdef __FreeBSD__
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static
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#endif
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void ipe4_attach(void);
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/* XXX IPCOMP */
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#define M_IPSEC (M_AUTHIPHDR|M_AUTHIPDGM|M_DECRYPTED)
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static void _ipip_input(struct mbuf *m, int iphlen, struct ifnet *gifp);
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#ifdef INET6
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/*
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* Really only a wrapper for ipip_input(), for use with IPv6.
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*/
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int
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ip4_input6(struct mbuf **m, int *offp, int proto)
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{
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#if 0
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/* If we do not accept IP-in-IP explicitly, drop. */
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if (!ipip_allow && ((*m)->m_flags & M_IPSEC) == 0) {
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DPRINTF(("ip4_input6: dropped due to policy\n"));
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IPIP_STATINC(IPIP_STAT_PDROPS);
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m_freem(*m);
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return IPPROTO_DONE;
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}
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#endif
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_ipip_input(*m, *offp, NULL);
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return IPPROTO_DONE;
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}
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#endif /* INET6 */
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#ifdef INET
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/*
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* Really only a wrapper for ipip_input(), for use with IPv4.
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*/
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void
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ip4_input(struct mbuf *m, ...)
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{
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va_list ap;
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int iphlen;
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#if 0
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/* If we do not accept IP-in-IP explicitly, drop. */
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if (!ipip_allow && (m->m_flags & M_IPSEC) == 0) {
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DPRINTF(("ip4_input: dropped due to policy\n"));
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IPIP_STATINC(IPIP_STAT_PDROPS);
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m_freem(m);
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return;
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}
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#endif
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va_start(ap, m);
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iphlen = va_arg(ap, int);
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va_end(ap);
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_ipip_input(m, iphlen, NULL);
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}
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#endif /* INET */
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/*
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* ipip_input gets called when we receive an IP{46} encapsulated packet,
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* either because we got it at a real interface, or because AH or ESP
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* were being used in tunnel mode (in which case the rcvif element will
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* contain the address of the encX interface associated with the tunnel.
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*/
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static void
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_ipip_input(struct mbuf *m, int iphlen, struct ifnet *gifp)
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{
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register struct sockaddr_in *sin;
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register struct ifnet *ifp;
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register struct ifaddr *ifa;
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struct ifqueue *ifq = NULL;
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struct ip *ipo;
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#ifdef INET6
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register struct sockaddr_in6 *sin6;
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struct ip6_hdr *ip6 = NULL;
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u_int8_t itos;
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#endif
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int isr;
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u_int8_t otos;
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u_int8_t v;
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int hlen;
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IPIP_STATINC(IPIP_STAT_IPACKETS);
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m_copydata(m, 0, 1, &v);
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switch (v >> 4) {
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#ifdef INET
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case 4:
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hlen = sizeof(struct ip);
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break;
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#endif /* INET */
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#ifdef INET6
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case 6:
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hlen = sizeof(struct ip6_hdr);
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break;
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#endif
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default:
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DPRINTF(("_ipip_input: bad protocol version 0x%x (%u) "
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"for outer header\n", v, v>>4));
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IPIP_STATINC(IPIP_STAT_FAMILY);
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m_freem(m);
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return /* EAFNOSUPPORT */;
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}
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/* Bring the IP header in the first mbuf, if not there already */
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if (m->m_len < hlen) {
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if ((m = m_pullup(m, hlen)) == NULL) {
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DPRINTF(("ipip_input: m_pullup (1) failed\n"));
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IPIP_STATINC(IPIP_STAT_HDROPS);
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return;
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}
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}
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ipo = mtod(m, struct ip *);
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#ifdef MROUTING
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if (ipo->ip_v == IPVERSION && ipo->ip_p == IPPROTO_IPV4) {
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if (IN_MULTICAST(((struct ip *)((char *) ipo + iphlen))->ip_dst.s_addr)) {
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ipip_mroute_input (m, iphlen);
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return;
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}
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}
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#endif /* MROUTING */
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/* Keep outer ecn field. */
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switch (v >> 4) {
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#ifdef INET
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case 4:
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otos = ipo->ip_tos;
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break;
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#endif /* INET */
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#ifdef INET6
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case 6:
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otos = (ntohl(mtod(m, struct ip6_hdr *)->ip6_flow) >> 20) & 0xff;
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break;
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#endif
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default:
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panic("ipip_input: unknown ip version %u (outer)", v>>4);
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}
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/* Remove outer IP header */
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m_adj(m, iphlen);
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/* Sanity check */
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if (m->m_pkthdr.len < sizeof(struct ip)) {
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IPIP_STATINC(IPIP_STAT_HDROPS);
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m_freem(m);
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return;
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}
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m_copydata(m, 0, 1, &v);
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switch (v >> 4) {
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#ifdef INET
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case 4:
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hlen = sizeof(struct ip);
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break;
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#endif /* INET */
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#ifdef INET6
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case 6:
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hlen = sizeof(struct ip6_hdr);
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break;
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#endif
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default:
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DPRINTF(("_ipip_input: bad protocol version 0x%x (%u) "
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"for inner header\n", v, v>>4));
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IPIP_STATINC(IPIP_STAT_FAMILY);
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m_freem(m);
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return; /* EAFNOSUPPORT */
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}
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/*
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* Bring the inner IP header in the first mbuf, if not there already.
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*/
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if (m->m_len < hlen) {
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if ((m = m_pullup(m, hlen)) == NULL) {
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DPRINTF(("ipip_input: m_pullup (2) failed\n"));
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IPIP_STATINC(IPIP_STAT_HDROPS);
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return;
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}
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}
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/*
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* RFC 1853 specifies that the inner TTL should not be touched on
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* decapsulation. There's no reason this comment should be here, but
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* this is as good as any a position.
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*/
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/* Some sanity checks in the inner IP header */
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switch (v >> 4) {
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#ifdef INET
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case 4:
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ipo = mtod(m, struct ip *);
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ip_ecn_egress(ip4_ipsec_ecn, &otos, &ipo->ip_tos);
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break;
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#endif /* INET */
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#ifdef INET6
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case 6:
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ip6 = (struct ip6_hdr *) ipo;
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itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
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ip_ecn_egress(ip6_ipsec_ecn, &otos, &itos);
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ip6->ip6_flow &= ~htonl(0xff << 20);
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ip6->ip6_flow |= htonl((u_int32_t) itos << 20);
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break;
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#endif
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default:
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panic("ipip_input: unknown ip version %u (inner)", v>>4);
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}
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/* Check for local address spoofing. */
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if ((m->m_pkthdr.rcvif == NULL ||
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!(m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK)) &&
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ipip_allow != 2) {
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IFNET_FOREACH(ifp) {
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IFADDR_FOREACH(ifa, ifp) {
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#ifdef INET
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if (ipo) {
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if (ifa->ifa_addr->sa_family !=
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AF_INET)
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continue;
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sin = (struct sockaddr_in *) ifa->ifa_addr;
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if (sin->sin_addr.s_addr ==
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ipo->ip_src.s_addr) {
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IPIP_STATINC(IPIP_STAT_SPOOF);
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m_freem(m);
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return;
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}
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}
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#endif /* INET */
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#ifdef INET6
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if (ip6) {
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if (ifa->ifa_addr->sa_family !=
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AF_INET6)
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continue;
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sin6 = (struct sockaddr_in6 *) ifa->ifa_addr;
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if (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &ip6->ip6_src)) {
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IPIP_STATINC(IPIP_STAT_SPOOF);
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m_freem(m);
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return;
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}
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}
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#endif /* INET6 */
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}
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}
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}
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/* Statistics */
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IPIP_STATADD(IPIP_STAT_IBYTES, m->m_pkthdr.len - iphlen);
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/*
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* Interface pointer stays the same; if no IPsec processing has
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* been done (or will be done), this will point to a normal
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* interface. Otherwise, it'll point to an enc interface, which
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* will allow a packet filter to distinguish between secure and
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* untrusted packets.
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*/
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switch (v >> 4) {
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#ifdef INET
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case 4:
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ifq = &ipintrq;
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isr = NETISR_IP;
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break;
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#endif
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#ifdef INET6
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case 6:
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ifq = &ip6intrq;
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isr = NETISR_IPV6;
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break;
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#endif
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default:
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panic("ipip_input: should never reach here");
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}
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if (!IF_HANDOFF(ifq, m, NULL)) {
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IPIP_STATINC(IPIP_STAT_QFULL);
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DPRINTF(("ipip_input: packet dropped because of full queue\n"));
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} else {
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schednetisr(isr);
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}
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}
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int
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ipip_output(
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struct mbuf *m,
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struct ipsecrequest *isr,
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struct mbuf **mp,
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int skip,
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int protoff
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)
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{
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const struct secasvar *sav;
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u_int8_t tp, otos;
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struct secasindex *saidx;
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int error;
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#ifdef INET
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u_int8_t itos;
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struct ip *ipo;
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#endif /* INET */
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#ifdef INET6
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struct ip6_hdr *ip6, *ip6o;
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#endif /* INET6 */
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IPSEC_SPLASSERT_SOFTNET("ipip_output");
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sav = isr->sav;
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IPSEC_ASSERT(sav != NULL, ("ipip_output: null SA"));
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IPSEC_ASSERT(sav->sah != NULL, ("ipip_output: null SAH"));
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/* XXX Deal with empty TDB source/destination addresses. */
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m_copydata(m, 0, 1, &tp);
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tp = (tp >> 4) & 0xff; /* Get the IP version number. */
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saidx = &sav->sah->saidx;
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switch (saidx->dst.sa.sa_family) {
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#ifdef INET
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case AF_INET:
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if (saidx->src.sa.sa_family != AF_INET ||
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saidx->src.sin.sin_addr.s_addr == INADDR_ANY ||
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saidx->dst.sin.sin_addr.s_addr == INADDR_ANY) {
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DPRINTF(("ipip_output: unspecified tunnel endpoint "
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"address in SA %s/%08lx\n",
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ipsec_address(&saidx->dst),
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(u_long) ntohl(sav->spi)));
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IPIP_STATINC(IPIP_STAT_UNSPEC);
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error = EINVAL;
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goto bad;
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}
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M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
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if (m == 0) {
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DPRINTF(("ipip_output: M_PREPEND failed\n"));
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IPIP_STATINC(IPIP_STAT_HDROPS);
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error = ENOBUFS;
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goto bad;
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}
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ipo = mtod(m, struct ip *);
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ipo->ip_v = IPVERSION;
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ipo->ip_hl = 5;
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ipo->ip_len = htons(m->m_pkthdr.len);
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ipo->ip_ttl = ip_defttl;
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ipo->ip_sum = 0;
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ipo->ip_src = saidx->src.sin.sin_addr;
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ipo->ip_dst = saidx->dst.sin.sin_addr;
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#if defined(__NetBSD__)
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ipo->ip_id = ip_newid(NULL);
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#elif defined(RANDOM_IP_ID)
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ipo->ip_id = ip_randomid();
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#else
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ipo->ip_id = htons(ip_id++);
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#endif
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/* If the inner protocol is IP... */
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if (tp == IPVERSION) {
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/* Save ECN notification */
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m_copydata(m, sizeof(struct ip) +
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offsetof(struct ip, ip_tos),
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sizeof(u_int8_t), &itos);
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ipo->ip_p = IPPROTO_IPIP;
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/*
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* We should be keeping tunnel soft-state and
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* send back ICMPs if needed.
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*/
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m_copydata(m, sizeof(struct ip) +
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offsetof(struct ip, ip_off),
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sizeof(u_int16_t), &ipo->ip_off);
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ipo->ip_off &= ~ IP_OFF_CONVERT(IP_DF | IP_MF | IP_OFFMASK);
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}
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#ifdef INET6
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else if (tp == (IPV6_VERSION >> 4)) {
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u_int32_t itos32;
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/* Save ECN notification. */
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m_copydata(m, sizeof(struct ip) +
|
|
offsetof(struct ip6_hdr, ip6_flow),
|
|
sizeof(u_int32_t), &itos32);
|
|
itos = ntohl(itos32) >> 20;
|
|
ipo->ip_p = IPPROTO_IPV6;
|
|
ipo->ip_off = 0;
|
|
}
|
|
#endif /* INET6 */
|
|
else {
|
|
goto nofamily;
|
|
}
|
|
|
|
otos = 0;
|
|
ip_ecn_ingress(ECN_ALLOWED, &otos, &itos);
|
|
ipo->ip_tos = otos;
|
|
break;
|
|
#endif /* INET */
|
|
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&saidx->dst.sin6.sin6_addr) ||
|
|
saidx->src.sa.sa_family != AF_INET6 ||
|
|
IN6_IS_ADDR_UNSPECIFIED(&saidx->src.sin6.sin6_addr)) {
|
|
DPRINTF(("ipip_output: unspecified tunnel endpoint "
|
|
"address in SA %s/%08lx\n",
|
|
ipsec_address(&saidx->dst),
|
|
(u_long) ntohl(sav->spi)));
|
|
IPIP_STATINC(IPIP_STAT_UNSPEC);
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
}
|
|
|
|
if (tp == (IPV6_VERSION >> 4)) {
|
|
/* scoped address handling */
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
|
|
ip6->ip6_src.s6_addr16[1] = 0;
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
|
|
ip6->ip6_dst.s6_addr16[1] = 0;
|
|
}
|
|
|
|
M_PREPEND(m, sizeof(struct ip6_hdr), M_DONTWAIT);
|
|
if (m == 0) {
|
|
DPRINTF(("ipip_output: M_PREPEND failed\n"));
|
|
IPIP_STATINC(IPIP_STAT_HDROPS);
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
}
|
|
|
|
/* Initialize IPv6 header */
|
|
ip6o = mtod(m, struct ip6_hdr *);
|
|
ip6o->ip6_flow = 0;
|
|
ip6o->ip6_vfc &= ~IPV6_VERSION_MASK;
|
|
ip6o->ip6_vfc |= IPV6_VERSION;
|
|
ip6o->ip6_plen = htons(m->m_pkthdr.len);
|
|
ip6o->ip6_hlim = ip_defttl;
|
|
ip6o->ip6_dst = saidx->dst.sin6.sin6_addr;
|
|
ip6o->ip6_src = saidx->src.sin6.sin6_addr;
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&ip6o->ip6_dst))
|
|
ip6o->ip6_dst.s6_addr16[1] = htons(saidx->dst.sin6.sin6_scope_id);
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&ip6o->ip6_src))
|
|
ip6o->ip6_src.s6_addr16[1] = htons(saidx->src.sin6.sin6_scope_id);
|
|
|
|
#ifdef INET
|
|
if (tp == IPVERSION) {
|
|
/* Save ECN notification */
|
|
m_copydata(m, sizeof(struct ip6_hdr) +
|
|
offsetof(struct ip, ip_tos), sizeof(u_int8_t),
|
|
&itos);
|
|
|
|
/* This is really IPVERSION. */
|
|
ip6o->ip6_nxt = IPPROTO_IPIP;
|
|
} else
|
|
#endif /* INET */
|
|
if (tp == (IPV6_VERSION >> 4)) {
|
|
u_int32_t itos32;
|
|
|
|
/* Save ECN notification. */
|
|
m_copydata(m, sizeof(struct ip6_hdr) +
|
|
offsetof(struct ip6_hdr, ip6_flow),
|
|
sizeof(u_int32_t), &itos32);
|
|
itos = ntohl(itos32) >> 20;
|
|
|
|
ip6o->ip6_nxt = IPPROTO_IPV6;
|
|
} else {
|
|
goto nofamily;
|
|
}
|
|
|
|
otos = 0;
|
|
ip_ecn_ingress(ECN_ALLOWED, &otos, &itos);
|
|
ip6o->ip6_flow |= htonl((u_int32_t) otos << 20);
|
|
break;
|
|
#endif /* INET6 */
|
|
|
|
default:
|
|
nofamily:
|
|
DPRINTF(("ipip_output: unsupported protocol family %u\n",
|
|
saidx->dst.sa.sa_family));
|
|
IPIP_STATINC(IPIP_STAT_FAMILY);
|
|
error = EAFNOSUPPORT; /* XXX diffs from openbsd */
|
|
goto bad;
|
|
}
|
|
|
|
IPIP_STATINC(IPIP_STAT_OPACKETS);
|
|
*mp = m;
|
|
|
|
#ifdef INET
|
|
if (saidx->dst.sa.sa_family == AF_INET) {
|
|
#if 0
|
|
if (sav->tdb_xform->xf_type == XF_IP4)
|
|
tdb->tdb_cur_bytes +=
|
|
m->m_pkthdr.len - sizeof(struct ip);
|
|
#endif
|
|
IPIP_STATADD(IPIP_STAT_OBYTES,
|
|
m->m_pkthdr.len - sizeof(struct ip));
|
|
}
|
|
#endif /* INET */
|
|
|
|
#ifdef INET6
|
|
if (saidx->dst.sa.sa_family == AF_INET6) {
|
|
#if 0
|
|
if (sav->tdb_xform->xf_type == XF_IP4)
|
|
tdb->tdb_cur_bytes +=
|
|
m->m_pkthdr.len - sizeof(struct ip6_hdr);
|
|
#endif
|
|
IPIP_STATADD(IPIP_STAT_OBYTES,
|
|
m->m_pkthdr.len - sizeof(struct ip6_hdr));
|
|
}
|
|
#endif /* INET6 */
|
|
|
|
return 0;
|
|
bad:
|
|
if (m)
|
|
m_freem(m);
|
|
*mp = NULL;
|
|
return (error);
|
|
}
|
|
|
|
#ifdef IPSEC
|
|
static int
|
|
ipe4_init(struct secasvar *sav, const struct xformsw *xsp)
|
|
{
|
|
sav->tdb_xform = xsp;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ipe4_zeroize(struct secasvar *sav)
|
|
{
|
|
sav->tdb_xform = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ipe4_input(
|
|
struct mbuf *m,
|
|
const struct secasvar *sav,
|
|
int skip,
|
|
int protoff
|
|
)
|
|
{
|
|
/* This is a rather serious mistake, so no conditional printing. */
|
|
printf("ipe4_input: should never be called\n");
|
|
if (m)
|
|
m_freem(m);
|
|
return EOPNOTSUPP;
|
|
}
|
|
|
|
static struct xformsw ipe4_xformsw = {
|
|
XF_IP4, 0, "IPv4 Simple Encapsulation",
|
|
ipe4_init, ipe4_zeroize, ipe4_input, ipip_output,
|
|
NULL,
|
|
};
|
|
|
|
#ifdef INET
|
|
PR_WRAP_CTLOUTPUT(rip_ctloutput)
|
|
PR_WRAP_USRREQ(rip_usrreq)
|
|
#define rip_ctloutput rip_ctloutput_wrapper
|
|
#define rip_usrreq rip_usrreq_wrapper
|
|
|
|
extern struct domain inetdomain;
|
|
static struct ipprotosw ipe4_protosw = {
|
|
.pr_type = SOCK_RAW,
|
|
.pr_domain = &inetdomain,
|
|
.pr_protocol = IPPROTO_IPV4,
|
|
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
.pr_input = ip4_input,
|
|
.pr_output = 0,
|
|
.pr_ctlinput = 0,
|
|
.pr_ctloutput = rip_ctloutput,
|
|
.pr_usrreq = rip_usrreq,
|
|
.pr_init = 0,
|
|
.pr_fasttimo = 0,
|
|
.pr_slowtimo = 0,
|
|
.pr_drain = 0,
|
|
};
|
|
#endif
|
|
#ifdef INET6
|
|
PR_WRAP_CTLOUTPUT(rip6_ctloutput)
|
|
PR_WRAP_USRREQ(rip6_usrreq)
|
|
#define rip6_ctloutput rip6_ctloutput_wrapper
|
|
#define rip6_usrreq rip6_usrreq_wrapper
|
|
|
|
extern struct domain inet6domain;
|
|
static struct ip6protosw ipe4_protosw6 = {
|
|
.pr_type = SOCK_RAW,
|
|
.pr_domain = &inet6domain,
|
|
.pr_protocol = IPPROTO_IPV6,
|
|
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
|
|
.pr_input = ip4_input6,
|
|
.pr_output = 0,
|
|
.pr_ctlinput = 0,
|
|
.pr_ctloutput = rip6_ctloutput,
|
|
.pr_usrreq = rip6_usrreq,
|
|
.pr_init = 0,
|
|
.pr_fasttimo = 0,
|
|
.pr_slowtimo = 0,
|
|
.pr_drain = 0,
|
|
};
|
|
#endif
|
|
|
|
#endif /* IPSEC */
|
|
|
|
/*
|
|
* Check the encapsulated packet to see if we want it
|
|
*/
|
|
static int
|
|
ipe4_encapcheck(struct mbuf *m,
|
|
int off,
|
|
int proto,
|
|
void *arg
|
|
)
|
|
{
|
|
/*
|
|
* Only take packets coming from IPSEC tunnels; the rest
|
|
* must be handled by the gif tunnel code. Note that we
|
|
* also return a minimum priority when we want the packet
|
|
* so any explicit gif tunnels take precedence.
|
|
*/
|
|
return ((m->m_flags & M_IPSEC) != 0 ? 1 : 0);
|
|
}
|
|
|
|
INITFN void
|
|
ipe4_attach(void)
|
|
{
|
|
|
|
ipipstat_percpu = percpu_alloc(sizeof(uint64_t) * IPIP_NSTATS);
|
|
|
|
xform_register(&ipe4_xformsw);
|
|
/* attach to encapsulation framework */
|
|
/* XXX save return cookie for detach on module remove */
|
|
#ifdef INET
|
|
(void) encap_attach_func(AF_INET, -1,
|
|
ipe4_encapcheck, (struct protosw*) &ipe4_protosw, NULL);
|
|
#endif
|
|
#ifdef INET6
|
|
(void) encap_attach_func(AF_INET6, -1,
|
|
ipe4_encapcheck, (struct protosw*) &ipe4_protosw6, NULL);
|
|
#endif
|
|
}
|
|
|
|
#ifdef SYSINIT
|
|
SYSINIT(ipe4_xform_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE, ipe4_attach, NULL);
|
|
#endif
|
|
|